Elements of Projective Geometry

*Elements of Projective Geometry* is a comprehensive introduction to the principles and applications of projective geometry, written by George Herbert Ling, George Wentworth, and David Eugene Smith. The book presents foundational concepts such as points at infinity, projection, perspective, harmonic division, and cross-ratio in a clear, structured manner. Designed for students and educators, it emphasizes logical development, visual understanding, and rigorous proofs. The text also explores the historical evolution and significance of projective geometry in both pure mathematics and practical fields like architecture and engineering. Its pedagogical clarity made it a valuable tool in early 20th-century mathematics education.